This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 4 |
| 3 | 5 |
| 4 | 9 |
| 5 | 11 |
| 6 | 12 |
| 7 | 20 |
| 8 | 28 |
| 9 | 30 |
| 10 | 84 |
| 11 | 108 |
| 12 | 118 |
| 13 | 143 |
| 14 | 149 |
| 15 | 208 |
| 16 | 330 |
| 17 | 362 |
| 18 | 1002 |
| 19 | 2395 |
| 20 | 3160 |
| 21 | 10535 |